Hi Rainbow,
It sux about the endo, but it's great that it's been diagnosed and you can start treatment soon.
I was TTC for over 2 1/2 years before i was diganosed with endo and although the doc said it was pretty bad (the photos he gave me afterwards are graphic!), he said that there are some women with it all the way up to their lungs!
It's nowhere near to late hun! You've got loads of great options for kids in the future.
Good luck with your treatment